How to join a skype group via link programmatically?

I was wondering how you can join a skype group on the web (with a guest account, not a real account) programmatically. Using links like: (http://ift.tt/2flLd2y) for example.

When you click the link it prompts you with a msgbox that asks you to either join with the desktop skype app (with an account) or continue as a guest < http://ift.tt/2fapKqp

If you continue as a guest, it asks for your guest name as shown here < prntscr.com/d39kkm

I want to be able to programmatically join as a guest preferably using C#.

Any ideas how?